body {
    background: #ececec;
    margin-bottom: 0.8rem;
}

img {
    width: 100%;
    height: 100%;
}

a {
    text-decoration: none;
    color: #fff;
}

.img_margin {
    margin: 0.85rem 0 0.45rem 0;
}

.btn {
    display: block;
    position: fixed;
    bottom: 0;
    left: 50%;
    margin: 0 0 0.1rem -3.5rem;
    width: 6.9rem;
    height: 0.6rem;
    font-size: 0.26rem;
    line-height: 0.6rem;
    background: #1a4d7f;
    color:#fff;
    font-weight: bold;;
    text-align: center;
    border-radius: 2px;
}